Engine.



E. DEMBOWSKY.

ENGINE.

APPLICATION .FILBD 23.27, 1912. 1,041,606, Patented 0ct.15,1912. v 2 SHEETS-SHEET 1.-

a a I 7 I E. DEMBOWSKY.

ENGINE. APPLICATION FILED P123 27, 1912. 1,041,606, Patented Oct. 15, 1912.

7 2 SHBETS-SHBET Z. .3 7 fi COLUMBIA PLANDGRAPH CO., WASHINGTON, D F.

EMIL DEMBowsKY, or IVIETUCHEN, NEW JERSEY.

ENGINE.

Specification of Letters Patent.

Patented Oct. 15, 1912.

Application filed February 27, 1912. Serial No. 680,340.

To all whom it may concern:

Be it known that I, EMIL DEMBOWSKY, a subject of the Emperor of Germany, residing at Metuchen, Middlesex county, New Jersey, have invented certain new and useful Improvements in Machines to be Used as Engines or Pumps, of which the following is a specification.

My invention relates to a machine which may be used as an engine or a pump. In case it is used asan engine steam or other gas will be delivered at the inlet to drive it and power will be transmitted from the shaft. In case it is used as a pump, power will be applied at the shaft and the inlet will be connected with a source of supply and the outlet to a suitable delivery. The invention consists in the combination of two cylinders and two rotary pistons so connected as to move synchronously as hereinafter set forth, also in certain details'of construction.

Figure 1, is a longitudinal sectional view of the device with the pistons in a given position. Fig. 2, is a cross-sectional view of. one of the cylinders and pistons. Fig. 3, is

a longitudinal sectional View of the two cylinders and pistons in a difiierent position. Fig. 4:, is a side view of said cylinders, the gear wheels by which the cranks of the pistons are joined being indicated. Fig. 5, is

a diagrammatic sketch showing the connections.

1 is a base of suitable form and construction on which is mounted two cylinders 2 and 8, equal in size and provided with openings 45 leading from each cylinder to the outlet 6 and the inlet 7. In these cylinders on the cranks 8 and 9 of shafts 10 and 11 I mount two rotary pistons 12 and 14, preferably cylindrical in form and provided with a web 15 having a central boss 16 through which the crank 8 extends. These pistons are joined one to the other by slides 16 and 17, one secured to one piston and the other to the other piston, both arranged to lie closely together and to be held in position by lugs 18 and 19 secured to the respective pistons far enough from the slide of the same piston to permit the slide from the opposite piston to lie between it and its own slide as shown plainly in Fig. 1. These slides are of sufficient width to fully fill the space between one flat wall of the cylinders to the other flat wall of the same.

A stufling-box 20 of ordinary construction and a pulley or fly-wheel 21 may be provided. In addition I prefer to use two gear wheels 22 and 23, one secured to shaft 10, the other to shaft 11 and meshing one with the other so as to insure a synchronous movement of the shafts and pistons of the respective cylinders.

The outlet 7 and the inlet 6 of the device lead 'to a four-way valve 24 shown in Fig. 5, by the turning of which, so that the outlets and inlets are changed, the motion of the machine, if steam pressure were used, would be reversed.

Upon the boss 31 ofthe cylinder-head I mount an oil-cup 32 and from it a channel 83 leads through the boss into the center of the shaft and thence through it to the hub andweb of the piston and through that to its extremity as shown plainly in Fig. 2. It has also a duct leading by a short pipe 34-35 to that point on the piston surface lying under the edge of the opposite slide.

The operation of the device is as follows: Steam being admitted at inlet 6 will so press against slide 16 and piston 12 as to carry it around in the direction of the arrow in Fig. 1, bringing it and also piston let to the positions shown in Fig. 3. From those positions the pistons move onward to the positions shown in Fig. 4;, thence to a position exactly the reverse to that of Fig. 3, that is with piston14 touching the interior of its cylinder at the right-hand side and piston 12 close to the opening 4 in its cylinder. If the pressure is continued the positions will continue to change as already indicated and power may be taken from the shaft or as already stated if it be used as a pump the water entering through inlet 6 will be forced around and out at outlet 4:, for the reason that at all times some point in the exterior surface of piston 12 and piston 14 is in contact with the interior surface of cylinder 2 or cylinder 3. The reverse of the apparatus needs no description.

The purpose of connecting the two pistons with slides as described instead of by a rigid abutment will be plain when a measurement from one piston to the other in Fig. 1 is compared with such a measurement in Fig. 2, because if the pistons are always to be in contact with the cylinders the distance from center to center in one position will be greater than in the other, consequently I have provided for this by the use of the slides in question. Their use enables me to secure a very simple and effective oiling device, as will be manifest. When slide 16 is drawn out between slide 17 and lug 19,, it

would tend to produce a vacuum behind it.

This space being connected with the oil ducts a small quantity of oil will be drawn in at this stroke. When the pistons assume the position of Fig. 2, this space is occu pied by the slides and consequently there is a compression of whatever gas or liquid may be in spaces between. This tends to force the oil heretofore drawn into the ducts to the peripheries of the piston as well as somewhat between the slides and provides for their continuous and convenient lubrication.

WVhat I claim as my invention and desire to secure by Letters Patent is 1., Ihe combination of two similar adjacent cylinders open to each other and to an inlet and an outlet, an inlet and an outlet, twosimilar pistons, one mounted in each cylinder on shafts with cranks whose eccentricity is equal to the difference in radii between the pistons and the cylinders, slides v rigidly secured to each piston and extending to a connection with the other.

2. The combination of two pistons oppositely set, two cylinders, cranks andconnec- Z tion and two slides extending from one piston to the other, an oil-duct leading from an oil cup to the periphery of the piston at a 5 Copies of this patent may be obtained for five cents. each, by addressing the Gommfssioner point immediately beneath the end of the slide of the opposite piston all substantially as set forth.

3. The combination of two similar adjacent cylinders open to each other and to an inlet and an outlet, an inlet and an outlet, two similar pistons, one mounted in each 1 cylinder on shafts with cranks whose eccentween the pistons and the cylinders, slides rigidly secured to each piston and extending to; a connection with the other together with similar gear wheels one on each shaft meshing with the similar gear on the other shaft.

4. The combination of two similar adjacent cylinders open to each other and to an inlet and outlet, an inlet and anoutlet, two similar pistons, one mounted in each cylinder on shafts with cranks whose eccentricity is equalto the difference in radii between i the pistons and the cylinders, slides arranged between the pistons and connected to each, all substantially as set. forth.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses, this 26th day of February, 19-12.

, EMIL- DEMBOWVSKY.

Witnesses:

WM. Drmwmmn,

A. G. N. VERMILYA.

Washington, D. 0;

tricity is equal to thedifl'erence in radii be-' of Patents, 

